Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Jon William Mares, DO

Individual provider Nephrology Physician · NPI 1023375300

Jon William Mares, DO is a Nephrology in Covington, Louisiana. Graduated from Kansas City University of Physicians and Surgeons in 2012, 14 years ago. Practices with Nni Covington LLC, a 5-clinician group and accepts Medicare assignment. Licensed in Illinois and Texas.

Years since qualifying
14
Trained at
Kansas City University of Physicians and Surgeons
Licensed in
IL, TX
In the registry since
2012
Specialties on file
2
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

1970 N Highway 190
Covington, LA 70433-5364
Phone: (985) 867-8585
Fax: (985) 867-3644
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Nephrology Physician (primary) Taxonomy 207RN0300X · Licence 036.151545 (IL)
Internal Medicine Physician Taxonomy 207R00000X · Licence Q6769 (TX)

Record details

NPI number1023375300
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedApril 11, 2012
Last updated in NPPESSeptember 17, 2025
Certification dateSeptember 17, 2025
Mailing addressPo Box 3370, Covington, LA 70434-3370

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNEPHROLOGY
Medical schoolKANSAS CITY UNIVERSITY OF PHYSICIANS AND SURGEONS
Graduated 2012 (14 years in practice)
Group practice Nni Covington Llc — 5 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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